S7011 ACD/P4ATBTB
Sealed Super Precision Angular Contact Ball Bearings
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S7011 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The S7011 ACD/P4ATBTB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set bearing features a Triplex Back-to-Back (TBT) arrangement, providing superior stability and the ability to handle combined loads—significant radial and bidirectional axial loads simultaneously. Manufactured to a P4A tolerance class, it ensures extremely tight dimensional control for high-precision machinery. Its sealed design and pre-lubrication offer reliable, long-term performance in high-speed operations up to 34,000 rpm.
S7011 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
- S7011: Basic model number, indicating a 55mm bore, 90mm OD, and 54mm width.
- ACD: Signifies an Angular Contact design with a 25° contact angle and a Light Preload (Class B).
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7, ensuring minimal runout and vibration.
- TBT: Indicates the bearing is supplied as a Triplex Back-to-Back matched set of three bearings.
- Sealed: The bearing is equipped with integral seals for contaminant exclusion and grease retention.
- Grease Lubrication: Pre-filled with high-performance grease suitable for the specified temperature range.
S7011 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
High Rigidity and Stability: The Triplex Back-to-Back (TBT) arrangement creates a highly rigid bearing system, ideal for applications where shaft deflection must be minimized. This configuration provides excellent moment load capacity.
Superior Load Capacity: With a dynamic load rating of 18,135 lbf and a static load rating of 20,925 lbf, this bearing is engineered to handle demanding combined radial and axial loads.
Optimized High-Speed Performance: The phenolic cage and 25° contact angle are optimized for high-speed operation, contributing to a limiting speed of 34,000 rpm. The precision grinding and tight tolerances further reduce friction and heat generation.
Enhanced Service Life: The sealed construction protects the chrome steel components from contaminants, while the pre-applied grease ensures consistent lubrication, resulting in a long, maintenance-free service interval.
S7011 ACD/P4ATBTB Bearing Typical Application Areas
This high-precision, high-rigidity bearing is ideally suited for:
- Machine Tool Spindles (e.g., for milling, grinding, and turning centers)
- High-frequency Spindles and Precision Gearboxes
- Robotic Drives and Rotary Tables
- High-performance Pumps and Compressors
- Other precision machinery requiring exceptional rotational accuracy and stiffness.
